equations

Question 1

density equation

Answer 1

density = mass/volume

Question 2

efficiency

Answer 2

efficiency = useful output energy/ total input energy

Question 3

specific heat capacity equation

Answer 3

change in thermal energy = mass * change in temp * specific heat capacity

Question 4

kinetic energy equation

Answer 4

kinetic energy=1/2 xmass x speed^2

Question 5

Gravitational potential energy equation

Answer 5

GPE= mass x gravitational field strength x height

Question 6

charge equation

Answer 6

Q= IT
Charge= current x time

Question 7

potential difference

Answer 7

V= IR
potent dif= current x resistance

Question 8

density

Answer 8

density = mass/volume

Question 9

elastic potential energy

Answer 9

EPE= 0.5 x spring constant x (extension)^2

Question 10

Power equation

Answer 10

E= PT
energy transferred= Power x time

Question 11

power equation

Answer 11

P= VI

Question 12

pressure and volume

Answer 12

pressure x volume = constant

Answer 13

weight= mass x gravity

Answer 14

work done= force x distance

Question 15

spring constant

Answer 15

F=EK
force= extension x spring constant

Question 16

pressure

Answer 16

pressure= force/ area

Question 17

distance equation

Answer 17

distance= speed x time

Answer 18

V^2 - U^2= 2AS

Question 19

S
U
V
A
T

Answer 19

S = distance
U = initial velocity
V = final velocity
A = acceleration
T = time

Question 20

SUVAT acceleration equation

Answer 20

a= v - u
/t